• Interaction With Powersets and Vector Spaces II. If $X$ is finite, then:
    1. The set of singletons sets on the elements of $X$ forms a basis for the $\mathbb {F}_{2}$-vector space $\webleft (\mathcal{P}\webleft (X\webright ),\alpha _{\mathcal{P}\webleft (X\webright )}\webright )$ of Item 17.
    2. We have
      \[ \dim \webleft (\mathcal{P}\webleft (X\webright )\webright )=\# \mathcal{P}\webleft (X\webright ). \]


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